[BUG] halog: correctly handle truncated last line

If last line is truncated (eg: truncated file), then halog would loop on
it forever.

contrib/halog/fgets2-64.c

@@ -155,6 +155,7 @@ const char *fgets2(FILE *stream)
 				return NULL;
 
 			*end = '\0';
+			end = line; /* ensure we stop next time */
 			return line;
 		}
 

contrib/halog/fgets2.c

@@ -130,6 +130,7 @@ const char *fgets2(FILE *stream)
 				return NULL;
 
 			*end = '\0';
+			end = line; /* ensure we stop next time */
 			return line;
 		}